Sofa



FIG. 1 is a front perspective view of a sofa showing my new design;

FIG. 2 is a front elevational view;

FIG. 3 is a rear elevational view;

FIG. 4 is an end elevational view, the opposite end view being a mirror image thereof; and

FIG. 5 is a top plan view thereof. 

The ornamental design for a sofa, as shown and described. 